Carton or box



Nov. 10, 1936.

I 3: ll

G. PERGANDE CARTON OR BOX Filed Sept. 20, 1935 INVENTOR.

ATTORNEY.

Patented Nov. 10, 1936 UNITED STATES PATENT" OFFICE CARTON OR BOX GeorgePergande, Chicago, Ill., assignor to Badger Carton. Company, Milwaukee,,Wis., a corporation of Wisconsin Application September 20, 1935, SerialNo.41,341 3 Claims. (01. 229 -39) There are on the market a great numberof various types of folding paperboard boxes wherein the end or sideclosure flaps are releasably secured in closing position by variousforms of locks and tongues, or by frictional engage ment of, inturnedfiap portions with adjacent wall surfaces. All of these priorconstructions have certain objectionable features. In some instances theeffectiveness of the closure depends upon accuracy in the cutting orformation of the fiaps or box walls. Others are somewhat diflicult tolock, and locking of the closure flaps may cause mutilation of some ofthe parts, rendering the box unfit for repeated opening and closingoperations. Still other constructions require too.

Some of the more specific objects of the pres-' ent invention may bedefined as follows:

To provide a carton with lockable closure flaps which will presentsmooth b ox ends;

To provide a carton with closure flaps which is well adapted to beautomatically closed on ma chinery for that purpose;

To provide a carton with interlocking closure flap members which havedual spaced apart engaging portions whereby the securement is veryeffectively. held against 'undesired release.

These and other objects and advantages will be apparent from thefollowing defailed description.

A clear conception of an embodiment of the present invention, and of themode of constructing and of utilizing cartons built in accordancetherewith, may be had by referring to the drawing accompanying andforming a part of this specification in which like reference charactersdesignate the same or similar parts in the varione view Fig. 1 is a planview of the carton blank prior to being folded and secured in shape;

Fig. 2 is an enlarged fragmentary perspective view of an end portion ofa carton with the closure flaps in open position;

Fig. 3- is an enlarged end view of the carton showing the closure flapsin locked relationship;

Fig. '4 is a similar view with portions broken away and in section toshow details of construction; and

Fig. 5 is a transverse sectional view taken on line 5-5 of Fig. 4, andon a larger scale.

While the present invention has been illustrated and described herein asbeing specifically applied to a folding box or carton with end closingflaps and of a particular shape, it is not intended to limit the scopeby such specific disclosure since some of the novel features mayobviously be applicable to boxes or cartons generally.

Referring to Fig. l of the drawing, it will be noted that the box isfolded from a one-piece blank cut to shape and formed of paperboard,cardboard, fiberboard, or any similar suitable material. A side wall 8is connected to atop wall ill by a fold line 9. and a similar fold lineH joins the other edge of said top wall to a side wall l2. A bottom wallI3 is foldable with respect to the other edge of the wall I! along afold line I4. A connecting flap I5 is carried by the other side edge ofthe wall l3 and is foldable on a fold line l6. At the ends of the walls8 and II are foldably attached inner end flaps I1 and I8 respectively.Foldably attached to the ends of the top wall I!) are outer end closurefiaps des- "ignated generally by the numerals l9. Said flaps 1.9 are ofpeculiar formation and are defined by.

lines of cut and. scored fold lines, as will hereinafter appear.Complementary end closure flaps 20 are foldably attached to theendsofthe wall l3. Each of the flaps 20 has cut in a medial portionthereof a spool-shaped opening 2|.

With particular reference to the outer end closure flaps l9, attentionis directed to Fig. 2, wherein one of the same is clearly illustrated.Attached to the free edge of said flap, intermediate its ends anddefined by a fold line- 22, is a tongue 23. Positioned substantiallymedially within the fiap l9 there is a U-shaped cut 25.v Extending fromthe ends of the cut to opposite side edges of the flap i9 are fold lines24 whereby there is separated from the inner portion of the flap, anelongated narrow area 26 having a tongue 21 movable into and out of theopening defined by the out 25.

The blank is folded into box-like form by bending each of the members 8,I0, l2, l3 and I5 at right angles to the member there adjacent. The flapI5 is underlapped with respect to the free edge of the side wall 8 andis adhered thereto. By this means a hollow box of rectangular form incross-section is provided, open at both ends. When the box is packedboth ends thereof are closed, and as the construction and closingoperation is the same for both of said ends, only one will be described.

The inner end flaps I1 and I 8 are first folded inwardly in partiallyoverlapping relationship and at right angles to the walls 8 and I2.Then, the flap 20 is folded over the flaps l1. and I 8, and the flap i9is next folded onto the flap 2|]. To look the end flaps in thisrelationship, the portion 26 carrying the tongue 21 is first bentoutwardly and the tongue 21 is slipped into one side of the spoolshapedopening 2| and engages under a portion of the flap 20. Next the tongue23 is slipped into the other side of the spool-shaped opening 21 andengages under a portion of the flap 20 opposite that portion engaged bythe tongue 21.

With the box closure flaps closed and looked as described very smoothouter surfaces result. There is a very secure double locking engagementbetween both of the tongues 23 and 21 and separated portions of theinner flap 20 whereby the closure may be subjected to severe internalpressure without becoming released. The locking flaps may be easily andquickly manipulated and the portions thereof will not become mutilatedor torn even after repeated use and opening and closing operations.

From the foregoing description it will be seen that the improved cartonor box, and the closure means therefor, is simple and novel, and is welladapted for the purposes described.

What is claimed as the invention is:

1. In a container, walls cooperable to provide an enclosure, closureflaps carried by some of said walls and cooperable to releasably closeone side of the container, said flaps being overlapping and the innerflap having a medially positioned opening of eccentric shape and havinga pair of spaced straight edges and a pair of inwardly curved edgesjoining the ends of the straight edges, one portion of the outer flapbeing bendable with respect to the adjacent portion and said bendableportion carrying a pair of oppositely directed flexible tongues, both ofthe tongues being insertable through said opening to engage the oppositestraight edges, and extending against opposite under surface portions ofthe inner flap.

2. In a container, walls cooperable to provide an enclosure, closureflaps carried by some of said walls and cooperable to releasably closeone side of the container, said flaps being overlapping and one of thesame having an opening of eccentric shape arranged with a pair of spacedstraight edges and a pair of inwardly curved edges joining the ends ofthe straight edges, the other flap having a bendable portion carrying apair of oppositely directed tongues, both of the tongues beinginsertable through said opening to engage the opposite-straight edges,and extending against surface portions of the flap having the openingtherein.

3. In a container, a closure flap formed with an opening thereinproviding a pair of spaced edges, another closure flap foldable againstthe first-mentioned flap and of less width than the same, a tongueprojecting from a free edge of said latter fiap and insertable throughthe opening of the other flap to engage one of said edges. and a tonguefoldable from an intermediate portion of said latter flap, the line offold for said tongue being substantially inwardly of the free edge ofsaid flap, said tongue being insertable in its normal direction ofextent through said opening to engage the other of said spaced edges.

GEORGE PERGANDE.

